{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "The effects of atrazine on periodicity and amplitudes were robust to 20 % changes in the food - chain model parameters that represented allometric relationships ."}
{"Chemical": ["atrazine"]}